<template>
    <div id="sidebar" :data-collapse="isCollapse">
        <div style="text-align: center; width: 100%;">
            <el-button v-model="isCollapse" @click="isCollapse = !isCollapse">切换</el-button>
        </div>
        <el-menu default-active="1-4-1" :class="{'el-menu--collapse': isCollapse}" @open="handleOpen" @close="handleClose">
            <el-submenu index="1">
                <template slot="title">
                    <i class="el-icon-message"></i>
                    <span slot="title">导航一</span>
                </template>
                <el-menu-item-group>
                    <span slot="title">分组一</span>
                    <el-menu-item index="1-1">选项1</el-menu-item>
                    <el-menu-item index="1-2">选项2</el-menu-item>
                </el-menu-item-group>
                <el-menu-item-group title="分组2">
                    <el-menu-item index="1-3">选项3</el-menu-item>
                </el-menu-item-group>
                <el-submenu index="1-4">
                    <span slot="title">选项4</span>
                    <el-menu-item index="1-4-1">选项1</el-menu-item>
                </el-submenu>
            </el-submenu>
            <el-menu-item index="2">
                <i class="el-icon-menu"></i>
                <span slot="title">导航二</span>
            </el-menu-item>
            <el-menu-item index="3">
                <i class="el-icon-setting"></i>
                <span slot="title">导航三</span>
            </el-menu-item>
        </el-menu>
    </div>
</template>

<script>
export default {
    name: 'sidebar',
    data() {
        return {
            msg: 'this is sidebar',
            isCollapse: true
        };
    },
    methods: {
        handleOpen(key, keyPath) {
            console.log(key, keyPath);
        },
        handleClose(key, keyPath) {
            console.log(key, keyPath);
        }
    }
}
</script>